These are two of the three Bastarnian names we know (we know no appellatives).
http://tech.groups.yahoo.com/group/cybalist/message/13998
(Googling, I find Chl- only in the Gibbons footnote quote, Cl- everywhere else, so I'll assume Cl-)
Could they be the regularly Grimm-shifted relative of that Aestian word *gl-a-s- which was loaned into Germanic (thus no Grimm)
http://tech.groups.yahoo.com/group/cybalist/message/58965
http://tech.groups.yahoo.com/group/cybalist/message/64397
cf. Vasmer
'glyadétI, glyaz^ú´ 'schauen, blicken',
ukr. hl´adíty,
wruss. hl´ad´z´éc´,
abulg. gledati, drân (Supr.),
bulg. glédam,
skr. gl`èdâm, gl`èdati,
sloven. glédati, glêdam,
c^ech. hlede^ti,
slovak. hl/adet´
poln. dial. gla,dac´,
osorb. hladac´, nsorb. gle^das´. ||
Urverw.
lett. (kur.) glendi 'suche', glenst,
glendêt 'sehen, suchen',
nuogleñst 'erblicken, gewahr werden',
ir. inglennat 'vestigant',
atgleinn 'demonstrat',
mhd. glinzen 'glänzen',
glanz 'Glanz',
norw. dial. gletta 'gucken',
mengl. glenten 'einen Blick werfen',
norw. glindra 'blinzeln',
viell. auch ir. glend, glenn 'Tal' (urspr. 'Lichtung'),
s. ... .
Weiter zu ahd. glîzzan 'gleißen, glänzen', s. ... .
So Clonix, Clondicus "the vigilant, the splendid"?
Torsten